Lero tikuwonetsa zinthu zitatu zazikulu za epe net, zomwe zikuphatikiza LDPE HDPE PP.

一,Kusiyana kwakukulu pakati pa LDPE (otsika kachulukidwe polyethylene) ndi HDPE (high kachulukidwe polyethylene) lagona kachulukidwe awo, katundu thupi, ntchito, etc.

1. Kachulukidwe ndi maonekedwe:

Kuchulukana kwa LDPE kumakhala pakati pa 0.910-0.940g/cm³, pomwe kachulukidwe ka HDPE ndi pakati pa 0.940-0.976g/cm³.

LDPE ili ndi mawonekedwe oyera amkaka ndipo imawonekera pang'onopang'ono m'zigawo zopyapyala, pomwe HDPE nthawi zambiri imakhala yowoneka bwino komanso yoyera ngati yamkaka komanso yowoneka bwino.

2. Katundu wathupi:

LDPE ndi yofewa pang'ono, imakhala yolimba bwino, imawonekera bwino, komanso imaterera. Ili ndi kukhazikika kosasunthika pakuwumba ndi kukonza, ndipo ndizovuta kulumikiza.

HDPE ili ndi mphamvu zambiri, kulimba kwabwino, ndi kulimba kolimba, pafupi ndi PP (polypropylene), yolimba kuposa PP, ndipo imakhala ndi kutentha kwabwino.

3. Gwiritsani ntchito:

LDPE ili ndi kukhuthala kotsika kosungunuka, madzi abwino, ndipo ndiyosavuta kuyikonza. Ndizoyenera kupanga mapaipi amadzi akumwa, etc.

HDPE ndiyoyenera kupanga giredi yojambulira, kalasi yopangira jakisoni, kalasi yopanda kanthu ndi zinthu zamagalasi zowulutsidwa, monga maukonde opha nsomba, mabotolo a zakumwa ndi matumba onyamula.

4. Chemical resistance:

Onsewa amatsutsa kwambiri mankhwala apanyumba ndi mafakitale, koma HDPE imalimbana kwambiri ndi asidi, dzimbiri la alkali ndi zosungunulira organic.

5. Kukana kutentha ndi kusakalamba:

LDPE ilibe kukana kutentha, kukana kukalamba komanso kukana kupsinjika kwa chilengedwe monga HDPE, ndipo imakonda kukalamba, kuwonongeka komanso kusinthika.

HDPE ili ndi kukana kwabwino kwa kutentha kwapamwamba koma kutsika kochepa kwa kutentha. Choyipa chake ndichakuti kukana kwake kukalamba komanso kukana kupsinjika kwa chilengedwe sikuli bwino ngati LDPE.

二,Kusiyana kwakukulu pakati pa zida za PP ndi PE ndi izi:

1. Zosakaniza: Chigawo chachikulu cha PP ndi polypropylene, pamene chigawo chachikulu cha PE ndi polyethylene.

2. Makhalidwe: PP nthawi zambiri imakhala yolimba yopanda mtundu, yopanda fungo komanso yopanda poizoni, yokhala ndi kukana kutentha kwakukulu, kuwonekera, mphamvu zamakina ndi zina; PE ndi chakudya chodziwika padziko lonse lapansi, chosakhala ndi poizoni, chosakoma, sichinunkhiza, chimamveka ngati sera, chimatsatira mfundo zaukhondo pamapakidwe a chakudya, chimakhala ndi ductility yabwino, sichiwonongeka mosavuta, ndipo chimakhala ndi kutentha kwambiri.

3. Kuchuluka kwa ntchito: PP angagwiritsidwe ntchito kupanga wowonjezera kutentha awnings, mulch mafilimu, mabotolo chikhalidwe, etc., ndipo angagwiritsidwenso ntchito kupanga chakudya cholowa mabokosi, matumba chakudya, etc. Pe akhoza kukonzedwa ndi kuwomba akamaumba, extrusion , jekeseni akamaumba ndi njira zina, ndipo chimagwiritsidwa ntchito popanga mafilimu, mankhwala dzenje, etc.