He aha nā ʻokoʻa ma waena o nā nunui plastics ʻekolu: HDPE, LDPE, a me LLDPE?

E nānā mua kākou i ko lākou kumu a me ko lākou iwi kuamoʻo (ka molecular structure). LDPE (polyethylene haʻahaʻa haʻahaʻa): E like me ka lāʻau lush! He nui nā lālā lōʻihi o kāna kaulahao molekala, e hopena i kahi ʻano wehe ʻole. Loaʻa kēia i ka haʻahaʻa haʻahaʻa loa (0.91-0.93 g/cm³), ʻoi aku ka palupalu a me ka maʻalahi. HDPE (high-density polyethylene): E like me nā koa i ka lālani! He liʻiliʻi loa nā lālā o kāna kaulahao molekala, no laila ke ʻano laina laina i paʻa paʻa a hoʻonohonoho pono. Hāʻawi kēia iā ia i ka mānoanoa kiʻekiʻe loa (0.94-0.97 g/cm³), ka paʻakikī, a me ka ikaika loa. LLDPE (linear low-density polyethylene): He mana "hoʻomohala" o LDPE! He laina laina kona iwi kuamoʻo (e like me HDPE), akā me nā lālā pōkole i puʻunaue like ʻia. Aia kona mānoanoa ma waena o nā mea ʻelua (0.915-0.925 g/cm³), e hui pū ana i kekahi maʻalahi me ka ikaika kiʻekiʻe.

Hōʻuluʻulu Manaʻo Koʻikoʻi: LDPE: Malū, akaka, maʻalahi e hana, a haʻahaʻa ke kumu kūʻai. Eia nō naʻe, ʻeha ia i ka ikaika ʻino, rigidity, a me ka pale ʻana i ka wela, e maʻalahi ai ka punctured. LLDPE: ʻO ka mea paʻakikī loa! Hāʻawi ia i ka hopena koʻikoʻi, ka waimaka, a me ka pale ʻana i ka puncture, ka hana haʻahaʻa haʻahaʻa maikaʻi loa, a me ka loli maikaʻi, akā ʻoi aku ka paʻakikī ma mua o LDPE. ʻOi aku ka maikaʻi o kona ʻike a me nā mea pale ma mua o LDPE, akā pono ka mālama ʻana. HDPE: ʻO ka paʻakikī loa! Hāʻawi ia i ka ikaika kiʻekiʻe, ka rigidity kiʻekiʻe, ke kūpaʻa kemika maikaʻi loa, ke kūpaʻa wela maikaʻi, a me nā waiwai pale maikaʻi loa. Eia nō naʻe, pilikia ʻo ia i ka maʻalahi a me ka haʻahaʻa haʻahaʻa.

Ma hea kahi e hoʻohana ʻia ai? Pili ia i ka noi!

ʻO nā noi a LDPE: nā ʻeke ʻeke maʻalahi like ʻole (ʻeke meaʻai, ʻeke berena, ʻeke ʻaʻahu), ʻili ʻili (no ka hale a me kekahi hoʻohana ʻoihana), nā ipu maʻalahi (e like me nā ʻōmole meli a me ketchup), ka uea a me ka hoʻokaʻawale ʻana i ke kaula, nā ʻāpana i hoʻoheheʻe ʻia (e like me nā pāpale ʻōmole a me nā mea pāʻani), a me nā uhi (ka pahu pahu waiu).

ʻO nā mea ikaika o LLDPE: nā kiʻi ʻoniʻoni kiʻekiʻe e like me ka stretch wrap (he mea pono e loaʻa no ka hoʻopili ʻana i nā ʻoihana), nā ʻeke ʻeke kaumaha (no ka hānai a me ka mea momona), nā kiʻi ʻoniʻoni mulch mahiʻai (ʻoi aku ka lahilahi, ʻoi aku ka paʻakikī, a ʻoi aku ka lōʻihi), nā ʻeke ʻōpala nui (ʻaʻole hiki ke haki), a me nā papa waena no nā kiʻiʻoniʻoni composite. ʻO nā ʻāpana i hoʻoheheʻe ʻia e koi ana i ka paʻakikī kiʻekiʻe e komo pū me nā barela, nā poʻi, a me nā ipu pā lahilahi. Hoʻohana ʻia hoʻi nā lining paipu a me ke kaula kaula.

ʻO ka ikaika o HDPE: nā ipu ʻoʻoleʻa e like me nā hue waiu, nā ʻōmole holoi, nā ʻōmole lāʻau, a me nā barela kemika nui. ʻO nā paipu a me nā mea pono nā paipu wai (ka wai anuanu), nā paipu kinoea, a me nā paipu ʻoihana. Loaʻa nā huahana hollow i nā pahu aila, nā mea pāʻani (e like me nā poloka hale), a me nā pahu wahie kaʻa. ʻO nā huahana i hoʻoheheʻe ʻia me nā pahu huli, nā pallets, nā pāpale ʻōmole, a me nā mea pono o kēlā me kēia lā (washbasins a me nā noho). Kiʻiʻoniʻoni: Nā ʻeke kūʻai (ʻoi aku ka ikaika), nā ʻeke huahana, a me nā ʻeke T-shirt.

Ke alakaʻi koho ʻōlelo hoʻokahi: Ke ʻimi nei i nā ʻeke ʻeke/kiʻiʻoniʻoni palupalu, akaka, a me ke kumu kūʻai? —————LDPE. Ke ʻimi nei ʻoe i kahi kiʻiʻoniʻoni ultra-paʻakikī, waimaka-kū ʻole, a i ʻole ke koi ʻana i ka paʻakikī haʻahaʻa haʻahaʻa? —LLDPE (ʻoi loa no ka ʻeke kaumaha a me ke kiʻi ʻoniʻoni). Ke ʻimi nei ʻoe i nā ʻōmole/barela/paipu paʻakikī, ikaika, kūpaʻa kemika no ka wai? —HDPE