ʻO wai ka mea i ʻoi aku ka maikaʻi, nā pahu nylon a i ʻole polyurethane?

ʻIke pinepine mākou i nā mea ʻelua, ka nylon a me ka polyurethane, i nā huahana like ʻole, ʻoi aku hoʻi i ke kahua o nā casters. Akā he aha ka ʻokoʻa ma waena o lākou, ʻo wai ka mea i ʻoi aku ka maikaʻi o ka hana? E ʻimi pū kāua.
ʻO ka mea mua, pono mākou e hoʻomaopopo i ka ʻokoʻa kumu ma waena o kēia mau mea ʻelua. ʻO ka maʻalahi, ʻo ka polyurethane kahi mea elastic i ʻoi aku ka palupalu, no laila ʻoi aku ka liʻiliʻi o ka walaʻau a ʻoi aku ka nui o ka friction. 'O ia ho'i, 'oi aku ka mālie o nā pahu polyurethane i ka hana, akā 'a'ole hiki ke 'a'ahu 'ia e like me nā pahu nylon.

A ʻoi aku ka paʻakikī o ka nylon, ʻoi aku ka maikaʻi o ka pale ʻana i ka abrasion. No laila, inā makemake ʻoe i ka mea hoʻoheheʻe me ka mana haʻahaʻa kiʻekiʻe a me ke kūpaʻa ʻana, ʻoi aku ka maikaʻi o nā casters nylon iā ʻoe!

No laila, no ke aha i ʻokoʻa ai kēia mau mea ʻelua? ʻO kaʻoiaʻiʻo, loaʻa nā mea āpau mai ko lākou ʻano kemika ponoʻī a me nā waiwai. Hana ʻia ka Polyurethane e ka polymerizing isocyanate me nā pūhui hydroxyl, a he maikaʻi kona kūʻē ʻana i ka aila, paʻakikī, kūpaʻa abrasion, kūpaʻa ʻelemakule a me ka hoʻopili. ʻO Nylon, ma ka ʻaoʻao ʻē aʻe, he kūpaʻa wela kiʻekiʻe, kūpaʻa luhi a me ke kūpaʻa abrasion, a me ka ikaika mechanical maikaʻi loa a me ke kūpaʻa dimensional.