ʻO ka ʻokoʻa ma waena o ke kaula polyethylene a me ke kaula polypropylene

I kēia mau lā, ua nīnau kekahi mea kūʻai e pili ana i ke kumukūʻai o ke kaula PP danline.He mea hana ka mea kūʻai aku i nā ʻupena lawaiʻa.ʻO ka mea maʻamau, hoʻohana lākou i ke kaula polyethylene. Akā ʻoi aku ka maʻalahi o ke kaula polyethylene a ʻoi aku ka maikaʻi a maʻalahi hoʻi e wehe ma hope o ke kāwili ʻana.ʻO ka pōmaikaʻi o ke kaula PP danline ʻo ia kona ʻano fiber.ʻOkaʻiʻo ka fiber a ʻaʻole paheʻe ka puʻupuʻu.

ʻO ka manaʻo manaʻo, ʻo ka molecular formula o propylene ʻo: CH3CH2CH3, a ʻo ka molecular formula o ethylene ʻo: CH3CH3.

ʻO ke ʻano o ka polypropylene penei:

— (CH2-CH (CH3) -CH2-CH (CH3) -CH2-CH (CH3)) n —-

ʻO ke ʻano o ka polyethylene penei:

— (CH2-CH2-CH2-CH2) n —-

Hiki ke ʻike ʻia ma ke ʻano he hoʻokahi kaulahao lālā o ka polypropylene ma mua o ka polyethylene.Ma hope o ka hana ʻana o ke kaula, ma muli o ke kuleana o ke kaulahao lālā, ʻoi aku ka ikaika o ke kaula polypropylene ma mua o ka polyethylene a ʻaʻole paheʻe ke kaula.

ʻOi aku ka maʻalahi o ke kaula polyethylene ma mua o ka polypropylene, a ʻoi aku ka palupalu.

He 0.91 ka nui o ka polypropylene, a he 0.93 ka nui o ka polyethylene.No laila ʻoi aku ke kaumaha o ke kaula PE ma mua o ke kaula PP.