Zombili izikhwama zokucindezela okuphezulu nengcindezi ephansi zenziwe nge-PE polyethylene.Izikhwama zepulasitiki eziphansizenziwe nge-polyethylene ephakeme kakhulu, izici eziyinhloko ziwukuthungwa okunzima, uzizwa uhle kakhulu, u-opaque, akulula ukuphuka.Ukuzinza okuphezulu, ukuzinza okuhle kwe-dimensional, ukumelana nokushisa namandla emishini, umgoqo womoya omningi wamanzi, ukungafihli kahle.
Izikhwama zepulasitiki ezinomfutho ophezuluzenziwe nge-polyethylene ye-low density, izici eziyinhloko zekhwalithi ethambile, ukukhanya okuhle, ukuzizwa kunamathele, ukugqoka kulula, amandla aphansi.Nge-crystallinity ephansi kanye nephoyinti lokuthambisa, ukuthambile nokwelula kungcono, ukumelana nomthelela.
Uyini umehluko phakathi kwesikhwama somfutho ophezulu kanye nesikhwama somfutho ophansi
1. Izinto ezibonakalayo, isikhwama somfutho ophezulu we-LDPE, owaziwa nangokuthi i-polyethylene ephansi;Isikhwama sokucindezela okuphansi i-HDPE, eyaziwa nangokuthi i-polyethylene ephezulu kakhulu.
2. Izici zezikhwama zepulasitiki eziphezulu zingcono kunezikhwama zepulasitiki eziphansi.Kodwa-ke, ngenxa yokuthambile, ubukhulu bezikhwama zepulasitiki ezicindezelayo bukhulu kakhulu kunokucindezela okuphansiizikhwama zepulasitiki, ngakho-ke idinga izinto eziningi kunezikhwama zepulasitiki eziphansi.Ngakho-ke, intengo yezikhwama zepulasitiki ezicindezelayo izoba phezulu.
3. Uma welula izikhwama zepulasitiki ngesandla, isenzakalo samamaki amhlophe siyinto ephansi yokucindezela, kuyilapho izinto ezicindezelayo zingenawo amamaki amhlophe.
4. Ngokuqondene nokubukeka, ukubonakala kwesikhwama sokucindezela okuphezulu kubukeka njengokukhanya okuthile, okuthambile futhi okubushelelezi, okunomsindo othambile, umsindo omncane, isandiso esikhulu nokuqina okuhle.Ukubonakala kwesikhwama esinengcindezi ephezulu kuphakeme, izinto zokusetshenziswa zezikhwama zepulasitiki eziphathwayo ezisezingeni eliphezulu, imikhiqizo yezimboni amaphakheji angaphandle, njengesikhwama sokupakisha sebhokisi, isitolo esikhulu esithengisa ukugoqa kwepulasitiki kwenziwa ngezinto ezinengcindezi ephezulu.
Isikhwama sokucindezela okuphansi asibukeki sicwebezelayo, sizizwa silukhuni, sixova phezulu, sidonsa kahle kakhulu, ukuqina kuphakeme kunesikhwama sokucindezela okuphansi, sisetshenziswa kabanzi ezikhwameni zokuthenga ezitolo ezinkulu, izikhwama zokuthenga emakethe emanzi.
Isikhwama sokucindezela okuphezulu sivame ukusetshenziselwa ukudla, ukusetshenziswa kwansuku zonke, imifino, i-shrinkage, ifilimu yokufaka ukukhanya okuzibambayo kanye nefilimu yepulasitiki yezolimo, ifilimu elichithiwe, ifilimu yokudla, njll.
Ifilimu enengcindezi ephansi ngenxa yamandla ayo aphezulu efilimu, esetshenziselwa ikakhulukazi ifilimu yokupakisha esindayo, ifilimu yokudabula kanye nesikhwama se-vesti.
Isikhathi sokuthumela: Mar-16-2023