Ubwoko bwamata yo gupakira amata nibisabwa bya firime

Kubera ko amata ari ikinyobwa gishya, ibisabwa ku isuku, bagiteri, ubushyuhe, nibindi birakomeye.Kubwibyo, hari nibisabwa byihariye mugucapura imifuka yo gupakira, ituma icapiro rya firime ipakira amata atandukanye nibindi bikoresho byo gucapa.Kugirango uhitemo firime yamata yamata, igomba kuba yujuje ibyangombwa byo gupakira, gucapa, gutunganya, kubika no gutwara no kugira isuku.Kugeza ubu, ibikoresho bya firime bikoreshwa cyane ni polyethylene (PE) ifatanije na firime, ikaba ishonga gusohora polyethylene resin no guhumeka.

Ubwoko bwa firime zo gupakira amata:

Ukurikije imiterere yabyo, irashobora kugabanwa muburyo butatu.
1. Filime yoroshye yo gupakira
Mubisanzwe ni firime imwe, ikorwa hiyongereyeho igipimo runaka cyibikoresho byera byera mubikoresho bitandukanye bya polyethylene kandi bigakorwa nibikoresho bya firime.Iyi firime yo gupakira ifite imiterere idafite inzitizi kandi yuzuyemo ubushyuhe bwa pasteurisation (85 ° C / 30min), hamwe nubuzima buke (hafi iminsi 3).
2. Firime yumukara wumukara hamwe numweru hamwe nuburyo butatu
Ni firime ikora cyane igizwe na LDPE, LLDPE, EVOH, MLLDPE nibindi bisigarira, ifatanije kandi ihuha hamwe n'ibishushanyo byirabura n'umweru.Umukara masterbatch wongeyeho ubushyuhe-kashe imbere imbere bigira uruhare rwo guhagarika urumuri.Iyi firime ipakira ikoresha ubushyuhe burenze urugero ako kanya sterisizione hamwe na hydrogène peroxide yo kuboneza urubyaro, kandi igihe cyo kubaho mubushyuhe bwicyumba gishobora kugera kumunsi 30.
3. Filime yumukara nuwera co-extrusion ipakira hamwe nuburyo butanu
Hagati ya bariyeri yo hagati (igizwe na barrière ndende nka EVA na EVAL) yongewemo iyo firime ivuzwe.Kubwibyo, iyi firime yo gupakira ni firime-barrière ya aseptic ipakira kandi ifite igihe kirekire kandi irashobora kubikwa mubushyuhe bwicyumba muminsi 90.Ibice bitatu kandi byinshi-byirabura hamwe numweru bifatanyirizwa hamwe bipfunyika bifite ibintu byiza bifunga ubushyuhe, birwanya urumuri na ogisijeni, kandi bifite ibyiza byigiciro gito, ubwikorezi bworoshye, umwanya muto wo kubikamo, kandi birashoboka cyane.

Ibisabwa bya firime ya polyethylene kubicuruzwa byamata:
Kugirango wuzuze ibisabwa byo kuzuza amata no kuyacapa, ingingo zikurikira zirakenewe cyane cyane kuri firime polyethylene.
1. Ubworoherane
Imbere ninyuma ya firime igomba kuba ifite neza kugirango irebe ko ishobora kuzuzwa neza kumashini yihuta yihuta.Kubwibyo, coefficente de dinamike na static yubuso bwa firime igomba kuba mike, mubisanzwe bisaba 0.2 kugeza 0.4 Ubworoherane bwa firime Nyuma ya firime imaze gukorwa, umukozi wo kunyerera yimuka ava muri firime akajya hejuru hanyuma akegeranya muburyo bumwe. , irashobora kugabanya cyane coefficient de fraisement ya firime kandi bigatuma firime igira neza.Ingaruka.
2. Imbaraga zikomeye
Kubera ko firime ya plastike ishobora guhura nubukanishi buva mumashini yuzuza byikora mugihe cyo kuzuza, birasabwa ko firime igomba kuba ifite imbaraga zihagije kugirango irinde gukururwa munsi yimashini yimashini yuzuza.Muburyo bwo gukina firime, gukoresha uduce twa LDPE cyangwa HDPE hamwe nu gipimo cyo hasi cyo gushonga ni ingirakamaro cyane kugirango utezimbere imbaraga za firime polyethylene.
3. Ubushyuhe bwo hejuru
Kugirango irangi ryacapwe risakare, ritose kandi rifatanye neza hejuru ya firime ya plastike ya polyethylene, birasabwa ko ubushyuhe bwa firime bugomba kugera ku gipimo runaka, kandi ni ngombwa kwishingikiriza kumiti ya corona kugirango ugere a hejuru yo guhanagura cyane, bitabaye ibyo bizagira ingaruka kuri wino kuri firime.Gufatanya no gukomera byubuso, bityo bikagira ingaruka kumiterere yibintu byacapwe.Mubisanzwe birasabwa ko hejuru yubushyuhe bwa firime polyethylene igomba kuba hejuru ya 38dyne, kandi nibyiza niba ishobora kugera hejuru ya 40dyne.Kubera ko polyethylene ari ibintu bisanzwe bidafite polar ya polymer, ntabwo irimo amatsinda ya polar mu miterere ya molekile yayo, kandi ifite kristu yo hejuru, imbaraga nkeya zubusa, imbaraga zidafite imbaraga, hamwe n’imiti ihamye.Kubwibyo, gucapa bikwiranye nibikoresho bya firime birarenze.Abakene, gufatira kuri wino ntabwo ari byiza.
4. Gufunga ubushyuhe
Ikintu gihangayikishije cyane mubipfunyika bya firime byikora nikibazo cyo kumena imifuka biterwa no kumeneka no gufunga ibinyoma.Kubwibyo, firime igomba kuba ifite uburyo bwiza bwo gufunga ubushyuhe bwo gukora imifuka, imikorere myiza yo gufunga, hamwe nubunini bugari bwo gufunga ubushyuhe, kugirango bushobore gukoreshwa mubipakira.Iyo umuvuduko uhindutse, ingaruka zo gufunga ubushyuhe ntizigira ingaruka cyane, kandi MLDPE ikoreshwa nkigice cyo gufunga ubushyuhe kugirango harebwe neza niba imiterere yubushyuhe hamwe nubushuhe bwa kashe.Ni ukuvuga ko, ari ngombwa kwemeza ubushyuhe no gushobora guca neza kugirango ibisigazwa byashongeshejwe bidafatana nicyuma.

Ongeraho igipimo runaka cya LLDPE mugikorwa cyo kuvuza firime birashobora kuzamura cyane imikorere yubushyuhe bwo hasi yubushyuhe no gushyiramo ubushyuhe bwa firime, ariko umubare wa LLDPE wongeyeho ntugomba kuba munini cyane, bitabaye ibyo ubwiza bwa firime polyethylene buzaba muremure cyane, hamwe nuburyo bwo gufunga ubushyuhe Bikunda gukomera kunanirwa.Kubishushanyo mbonera bya firime, firime yo gupakira imiterere ihuye irashobora gutoranywa ukurikije ibintu bitandukanye biri muri paki hamwe nubuzima bwayo.