Chii chinonzi PE?
PE, inozivikanwa se polyethylene (Polyethylene), chimwe chezvinhu zvepurasitiki zvinoshandiswa zvakanyanya pasi rose. Nekuda kwekunaka kwayo kwemuviri uye makemikari zvimiro, PE zvinhu zvinoshandiswa mumhando dzakasiyana maindasitiri. Kubva pamabhegi ekurongedzerwa kusvika kumidziyo yepombi, polyethylene inenge kwese kwese. Muchikamu chino, tichaongorora zvakadzama kuti PE chii, marudzi ayo, zvivakwa uye nzvimbo dzekushandisa.
1. Chimiro chemakemikari uye kupatsanurwa kwePE
PE is thermoplastic resin inogadzirwa kubva ethylene monomers kuburikidza ne polymerization reaction. Zvichienderana nekumanikidzwa uye tembiricha mamiriro panguva ye polymerization process, PE zvinhu zvinogona kuiswa mumhando dzinoverengeka:
Low Density Polyethylene (LDPE): Rudzi urwu rwePE zvinhu zvakanyanya kurongeka pakati pemaketani emamorekuru uye ane density yakaderera.LDPE ine yakanaka kuchinjika uye ductility, uye inoshandiswa zvakanyanya mukugadzirwa kwemafirimu epurasitiki, zvinhu zvekurongedza, uye mafirimu ekurima.

High Density Polyethylene (HDPE): Maketani emakemikari eHDPE akanyatsorongedzwa uye ane huwandu hwepamusoro, saka inoratidza simba riri nani uye kushorwa kwemakemikari.HDPE inowanzoshandiswa pakugadzira pombi, mabhodhoro uye midziyo yepurasitiki.

Linear Low Density Polyethylene (LLDPE): LLDPE i polyethylene yakaderera ine linear molecular structure inosanganisa kuchinjika kweLDPE nesimba reHDPE. Inowanzo shandiswa kugadzira kutambanudza firimu, mabhegi epurasitiki uye maindasitiri ekurongedza zvinhu.

2. Hunhu hunokosha hwezvinhu zvePE
PE zvinhu zvine huwandu hunoshamisa hwemuviri uye kemikari zvimiro nekuda kweiyo yakasarudzika mamorekuru chimiro, izvo zvinoita kuti ibudirire mumhando dzakasiyana dzekushandisa:
Kemikari kuramba: PE zvinhu zvinopikisa zvakanyanya kune akawanda acids, alkalis, munyu uye zvinonyungudutsa pakamuri tembiricha, izvo zvinoita kuti ive yakanakira maindasitiri emakemikari nemishonga.

Yakanaka kukanganisa kupikisa uye kusimba kwesimba: HDPE, kunyanya, ine simba rakawanda uye kusimba uye inogona kumirisana nepamusoro mechanicha kusagadzikana, ichiita kuti inowanzoshandiswa kugadzira zvigadzirwa zvinoda kutsungirira mitoro.

Yakanakisa insulating zvivakwa: PE zvinhu ndeye yakanakisa magetsi insulator, iyo inoita kuti ishandiswe zvakanyanya senge insulating layer yetambo uye waya.

Yakaderera Mvura Yekunyura: PE zvinhu zvine yakaderera mvura yekunyudza uye nekudaro inochengeta yayo yemuviri hunhu munzvimbo dzine hunyoro.

3. Nzvimbo dzekushandisa dzePE zvinhu
Nekuda kwezvakasiyana-siyana uye zvakanakisa zvivakwa, PE zvinhu zvinoita basa rakakosha muhupenyu hwezuva nezuva uye mumaindasitiri. Kuziva kuti PE chii kunotibatsira kuti tinzwisise zviri nani huwandu hwayo hwakawanda hwekushandisa munzvimbo dzakasiyana:
Packaging Indasitiri: PE zvinhu zvinoshandiswa zvakanyanya mukugadzirwa kwemafirimu epurasitiki, mabhegi ezvikafu zvekurongedza uye mafirimu ekurima.LDPE neLLDPE inonyanya kukodzera kugadzira zvakasiyana-siyana zvekurongedza zvinhu nekuda kwekunyatso shanduka uye ductility.

Indasitiri yekuvaka uye yepombi: HDPE inowanzoshandiswa mukugadzira mapaipi emvura, mapaipi egasi nemapombi emakemikari nekuda kwekumanikidza kwayo kukuru uye kuramba kwemarara.

Zvigadzirwa zvemumba: Zvigadzirwa zvepurasitiki zvakawanda zvemazuva ese, zvakaita semabhaketi, masaga emarara nemidziyo yekuchengetera chikafu, zvinogadzirwa kubva kupolyethylene.

4. Kuchengetedzwa kwezvakatipoteredza uye kudzokororwa kwezvinhu zvePE
Kunyangwe zvakanakira zvakawanda, kushandiswa kwakapararira kwezvinhu zvePE kwaunza matambudziko ezvakatipoteredza. Nekuti haidzikisire zviri nyore, zvakaraswa zvigadzirwa zvePE zvinogona kuve nemhedzisiro yakaipa kwenguva refu pane ecosystem. Polyethylene zvinhu zvinogadziriswa zvakare. Kuburikidza nemaitiro emuviri kana kemikari, zvigadzirwa zvePE zvakaraswa zvinogona kudzokororwa kuita zvinhu zvitsva, nokudaro zvichideredza kukanganisa kwezvakatipoteredza.
Mhedziso
Kuburikidza nekuongorora kuri pamusoro, tine nzwisiso yakadzama yenyaya ye "chii chinonzi PE zvinhu". Seyakanyanya kukosha epurasitiki zvinhu, polyethylene inoshandiswa zvakanyanya mumaindasitiri akasiyana nekuda kweiyo yakasarudzika chimiro uye yakanakisa zvivakwa. Kunyangwe kushandiswa kwayo kuchiunza matambudziko ezvakatipoteredza, manejimendi akasimba ezvinhu zvePE anogona kuwanikwa kuburikidza nekudzokorodza zvine musoro.