Ulwazi oluyisisekelo lwefilimu yepulasitiki

Emigomeni EJWAYELEKILE YOKUPAKASHA KAZWELONKE (GB4122-83), incazelo yokupakisha eguquguqukayo ithi: ukupakisha okuguquguqukayo kubhekisela emaphaketheni angashintsha ukuma kwesiqukathi ngemva kokugcwalisa noma ukukhipha okuqukethwe. Zonke izinhlobo zezikhwama, amabhokisi, amasethi kanye nezimvilophu ezenziwe ngephepha, i-aluminium foil, i-fiber, ifilimu yepulasitiki kanye nezinkimbinkimbi zazo ziyiphakheji eguquguqukayo. Ngokuvamile, amapulasitiki eshidi anogqinsi olungaphansi kuka-0.25mm abizwa ngokuthi amafilimu. Ifilimu yepulasitiki isobala, iguquguquka, inokumelana okuhle kwamanzi, ukumelana nomswakama kanye nokumelana komoya, amandla amahle emishini, izakhiwo zamakhemikhali ezinzile, ukumelana nowoyela, kulula ukuphrinta umbhalo omuhle, ingashisa isikhwama sophawu. Ingakwazi ukuhlangabezana nezidingo zokupakisha zazo zonke izinhlobo zezinto, isetshenziswa ekufakweni kwezinto okulula ukukugcina, ukubekeka kalula ukudla okulula, izidingo zansuku zonke, isitolo esikhulu sezimpahla ezincane zephakeji impahla ekahle. I-Guangdong Danqing Printing Co., Ltd ineminyaka engu-30 yesipiliyoni ekukhiqizeni ukupakisha okuguquguqukayo, ikakhulukazi ukukhiqiza isikhwama se-spout, isikhwama sokumisa u-zipper, ifilimu ye-plastic roll nokunye; Nikeza ngokuphrinta okuhle, ungaphrinta imibala efika kweyi-13.

Ukuphrinta kokupakisha okuguquguqukayo okusekelwe kwifilimu yepulasitiki kudlala indima ebalulekile ekunyatheliseni kokupakisha. Ngokwezibalo, kusukela ngo-1980, ukupakishwa kwepulasitiki kwamanye amazwe asethuthukile emhlabeni kufinyelela ku-32.5% ~ 44% yawo wonke ukuphrinta kokupakisha.

Ngokuvamile, ngenxa yokuthi impahla yefilimu eyodwa ayilungele ukuvikela ingaphakathi, ngakho-ke izinhlobo zamafilimu ezingaphezu kwezimbili zisetshenziselwa ukuhlanganisa ungqimba lwefilimu eyinhlanganisela, ukuze kuhlangatshezwane nezidingo zokugcinwa kokudla, ubuchwepheshe bokupakisha be-aseptic. Ukukhethwa kwezinto zangaphandle zefilimu ehlanganisiwe akulula ukuklwebheka, ukugqokwa, ukusebenza kahle kwe-optical, ukusebenza kahle kokuphrinta kwezinto, njengalezi: iphepha, i-cellophane, i-tensile polypropylene, i-polyester, njll.; Ungqimba oluphakathi luyi-polymer evimbelayo, njengalokhu: ucwecwe lwe-aluminium, i-aluminium eshisayo, i-polyvinyl diazene ungqimba kagesi wangaphakathi izinto ezikhethiwe ikakhulukazi ezingenabuthi, i-polyethylene enganambitheki kanye nenye inhlaka ye-thermoplastic.